Refillable pen



Sept. 9, 1930. 3, J. K0RNDORFER ET AL 1,775,350

REFILLABLE PEN Filed Dec. 6, 1928 INVENTOR Patented Sept. 9, 1930 UNITEDSTATES PATENT OFFICE CASIAR J. KORNDORFEB, or ALLENDALE, NEW JERSEY, ANDLESLIE T. HAINE, or BROOKLYN, NEW YORK REFILLABLE 1EN Application filedDecember 6, 1928. Serial No. 324,197.

This invention relates to refillable pens for use With recordinginstruments, such as stock ticking machines and the like, and thepresent improvements are directed to a pen having a hollowcylindricalbody portion to serve as an ink reservoir, said body portion beingprovided with a plunger for filling the reservoir under the influence ofsuction, and said plunger having a detachable stem for its operation.

A further feature of invention consists in certain novel means vvherebythe plunger may be extended radially t0 compensate for wear, and a stillfurther feature of invention consists in the novel means employed fordetacl1ably connecting the pen to its operating sha t.

Other features and advantages of the invention Will hereinafter appear.

In the drawing:

Figure 1 is an elevation of the improved pen, shown attached to theshaft of a recording instrument;

Fig. 2 is a bottom plan view thereof;

Fig. 3 is an exploded view of the pen attaching parts, and

Fig. 4: is a vertical sectional view showing the reservoir filled andthe operating stem removed.

In said figures let 1 indicate a portion of the oscillatory shaft of arecording instrument, and 2 a clip for detachably connecting a pen tosaid shaft.

The pen is here represented as comprising a hollow, cylindrical bodyportion 3, consti- .tuting an ink reservoir, and a tubular extension 4thereof which depends from said body portion and is smaller in diameter,said extension 4. having a nib or pen point 5 fitted in its lower end.The body portion is in the form of a cylinder in order thata plunger mayoperate therein to fill the reservoir with ink, a stem or handle 6removably engaging said plunger to draw it outwardly, when the lower endof the pen is immersedin ink, to perform the filling operation bysuction.

The plunger is composed of a disk of felt or the like 7, mounted on ascrew 8 that is provided with a head 9. Metallic disks 10, 11 are placedrespectively at opposite sides of said felt disk, the metallic disk 10lying between the screw head 9 and the felt disk, this disk 10 being innon-engaging relation with the thread of screw 8, but themetallic disk11, at the opposite side of the felt disk, is threaded and engagedthereby upon screw 8. r The metallic disks 10, 11 are smaller indiameter than the felt disk in order that they may ridefifreely withinthe cylinder, but the felt disk 7 is of suflicient diameter to havefrictional contact with the cylinder so that it may perform the functionof a suction plunger. After considerable service, When the peripheralsurface of the felt disk becomes worn and inefficient, its efficiencymay be restored by turning the screw 8, t0 tighten the metallic disk 11against the felt disk, thereby clamping the felt between the metallicdisks and causing the felt disk to become radially enlarged. A threadedsleeve 12, screwed upon screw 8, against the outer surface of met allicdisk 11, serves as a look nut to secure the parts in their adjustedposition. The plunger operating stem or'handle 6 is provided at itsinner end with an internal thread which is adapted to engage theexposedendof screw 8, and When so engaged the plunger may be operatcd by saidhandle. The handle or stem 6 is used to draw the plunger ontvvardlyinthe pen filling operation, and when this duty is performed the handle orstem is to be removed, by unscrewing it from its engagement with screw8.

This is done in order that the weight of said handle or stem may not beadded to that of the pen in service, nor form an unnecessary projectionfrom the pen.

The closure cap 13 for the reservoir, here shown as provided with athreaded portion 14 to engage a thread at the upper end of the cylinder,is provided with a central orifice 15 to receive the stem 6. saidorifice also serving as a guide in axially aligning said stem 6 with thescrew 8,when these elements are to be engaged.

It Will be understood that when the contents of the reservoir have beenused and the refilling operation is to be performed, first the stem 6 sconnected with screw 8,

then the plunger is pressed downwardly, and finally the plunger is drawnoutwardly in the refilling act. The subsequent removal of the stem orhandle leaves the pen in readiness for use.

The clip 2, which is adapted to embrace the pen extension 4 is carriedby a block 16 that has an opening 17 in its side adapted to receive theend of shaft 1, a set screw 19, threaded through the top of blook 16,impinging upon the shaft to hold it in place. It being important that norelative movement loe permitted between the shaft and pen the block isprovided with grooves 20 WhiCh reeeive pins 21 that project fromopposite sides of shaft 1, to positivel hold said shaft aigainstrotation in block 16.

The relatively large size of the reservoir enables the pen to hold anink supply far in excess of that carried by the pens now in use withrecording machines, while: the simple refilling means employed permitsthe pen to be recharged expeditiously with a minimum amount of labor.

Variations within the spirit and scope of this invention. are equallycomprehended by the foregoing disclosure.

VVe daim: V

A pen for recording instruments having an oscillatory arm including aohambered body portion presenting a reservoir adapted to reeeive asup'ply of writihg fiuid, a b0red eX- tension depending from saidbodyportion and adapted to support a nib, and means for securing the pen tothe oscillatory arm of an instrument, said means including a clipadapted to embrace said extension, an apertur'ed block removablyoarrying said arm, said block provided with a groove and said arm havinga pin thereon t0 engage said groove.

Signed at New York, in the city, eounty, and State of New York, this26th day of November, 1928.

' CASPAR J KORNDORFER.

LESLIE T. HAND.

